Process of treating paper tubes.



EUEEEJT G. CLYNE, OE ALTON, IEJDINDIS.

JPEUCESS E TREATING PAPER TUBES ll, ll35,35fi. lto Drawing.

. and State of lllinois, have invented certain new and useful Improvements in Processes of Treating Paper 'lubes, of which the following is a specification.

My invention relates to improvements in the process or method of treating papertubes or shells and, more particularly, to an improved method or process of water and fire proofing paper tubes for use in the course of the manufacture of what are being coated with suitable adhesive material lmown as shot-shell cartridges.

' By my improved process or method, ll am enabled to so completely permeate or impregnate the walls of the paper tubes during the process of manufacture with the water and tire proofing liquid, as to render the paper shot-shells, when completed, moisture and fire proof.

By the present method or process commonly employed by cartridge manufacturers, the construction of the tubes and the method of manufacture are such that it is impossible to entirely permeate the tubes with the water and fire proofing liquid materials for reasons to be noted below.

In the process of manufacture of paper shot shells, the paper tubes are usually formed of suitable length by winding or rolling one or more sheets of paper upon a mandrel, forming a plurality of superposed coils or'layers of material, the tube paper so that when the rollin of the tube is completed a thin layer or m of adhesive material is formed between each convolution or coil of paper, which adhesive material when dry forms a hard obstructive agent between the different superposed coils of paper and acts to prevent or obstruct the penetration of the pa er by the water and fire proofing materia Furthermore, the

ermeability of these tubes varies somewhat y reason of variations in the character and permeability of the tube-paper from which the tubes are made, some sheets of tube paper being harder or less permeable than h due t v riat ons n the u n t 9t specification of Letters Patent.

Patented Apr. l3, lfild,

application filed May 26, 1913. Serial lt'o. 770,064.

sizing used in the manufacture of the tubepaper. lBy reason of the above obstructive agents, considerable expense is incurred in present methods or processes, the completed tubes (from which the shot shells are afterward out into suitable length) being subjected to the action of the water and fire proofing material -for from one (l) to two and one-half (2%) hours, and it being necessary that the water and fire proofing liquid be maintained at a temperature of from 130 to 200"Fahrenheit. By reason of the time consumed and the large capacity required in carrying out this process con-v siderable expense is incurred in treating or impregnating the paper tubes with the treating material, and the final results vary and are often unsatisfactory.

By my improved process or method; I am able to thoroughly impregnate or saturate the tubes with a suitable water and fire proofing liquid material in from twenty (20) to forty 40) minutes, and in a much more efiective manner.

Generally speaking, my improved process or method consists in thoroughly impregnating the tubes with a suitable volatile liquid material such as gasolene, or the like, as a preliminary or preparatory treatment, and then subjecting the same to a hot'liquid of suitable water and fire-proofing material until the latter has volatilized the prelimi- I nary liquid creating a artial vacuum or rather a capillary attraction in the pores of the tubes and causing the hot liquid water and fire proofing material to thoroughly penetrate or impregnate the walls of the tubes bein treated.

As a suitable volatile liquid in the preliminary treatment, l have found that gasolene penetrates the walls of the tubes very .rapidly and, considering the cost of ma- After the tubes have been dipped in this volatile liquid material, and for a compara- 1 the volatile liquid in the first dip or step in the process penetrating the walls of the tubes in a very short time and opening or preparing the pores of the tubes by the softening of the sizing material contained in the paper as well as softening the hardened layer or film of adhesive material between v the several coils or convolutions of the paper, the quick volatilization or evaporation of the first or preliminary treating material resulting in capillary attraction as before referred to and causing the hot water and fire proofing material to quickly penetrate or impregnate the walls of the tube.

The most commonly employed water and 'fire proofing material comprises paraflin, either in its ordinary plain state or mixed with lighter oils or greases, and in carrying out my process or method I prefer to heat the paraflin to about 160 Fahrenheit, and in carrying out the process it will be best to completely submerge the treated tubes in both the preliminary and final treating liquids so that any air in the walls of the tubes will be driven outby the penetration of the initial treating or volatile liquid, the latter at the same time penetrating the sizing and pasting materials to. reduce them to a soft state, after which the tubes should immediately, and before evaporation commences, be placed in the hot water and fire proofing material and completely submerged therein so that air cannot penetrate the tubes as the hot liquid is volatilizing the volatile or preliminar treating liquid. As the hot water and re proofing material 'volatiliz'es the volatile liquid the latter passes from the tubes and through the water and fire proofing material in the form of gas bubbles, and in the act of passing off, the water and fire proofing material enters and is attracted therein by capillary attraction whereby the tubes are thoroughly permeated and impregnated.

The water and fire proofin material which usually comprises a ara n wax, in either a crude or highly re ned form, may, however, comprise an insect wax or an animal Wax,such as bees wax, Chinese wax, or the like, or a vegetable wax, may be used, or in a suitable combination of such waxes, is dlesired and adapted for the work in Having thus described my improved method or process, and a means for carrying it into effect, what I claim and desire to secure by Letters Patent is,

1. The process of treating paper-tubes, consisting in (l) impregnating the same in a volatile liquid and (2) then volatilizing the latter by impregnating the tubes with a hot water and fire-proofing liquid.

2. The process of treating paper-tubes, consisting in (1) giving the same a preliminary softening and saturating bath in a volatile liquid, and (2) subjecting the same to a hot liquid of water and fire-proofing material until the latter has volatilized said volatile liquid and impregnated the walls of the tube being treated.

3. The process of treating paper-tubes for making paper shot-shells, consisting in.

(1) saturating the same with a volatile liquid, until the latter has reduced the sizing and adhesive material to a softened state, and- (2) subjecting to a moisture and flame resisting liquid material at a high temperature whereby the first liquid is volatilized and the second enters and fills the space occupied by the first.

4. The process of treating paper-tubes, consisting in (1) submerging the same in a volatile liquid until thoroughly impregnated thereby, and the hardened adhesive material softened, and (2) then submerging the same in a hot liquid whereby the first liquid is volatilized and passes'out into the second in the form of a gas and the second enters and impregnates the walls of the tubes through capillary attraction.

5. The process of treating paper-tubes, consisting in (1) submerging the same in and impregnating the same by a volatile liquid, and (2) immediately submerging the same in a hot liquid until said volatile liquid is volatilized and driven from the walls of said tubes, said hot liquid comprising a liquid wax adapted when cooled and set in the walls of said tube to resist moisture and combustion.

6. The process of treating paper-tubes, consisting in (1) submerging the same in a volatile iquid until softened and impregnated thereby and (2) immediatelv submerging the same in liquid parafiin for twenty (20) to forty (40) minutes and at a temperature of from 130 to 200 Fahrenheit, whereby said first mentioned liquid is volatilized and passed off into the second in the form of a gas.

7. The process of treating paper-tubes for making paper shot-shells, said papertubes comprising a plurality of coils or convolutions of paper and intermediate layers of hardened adhesive material, consistmg m (1) submerging said tubes in a volatile liquid until the sizing material in said paper and said hardened layers of adhesive material are reduced to a softened state, and (2) then subjecting the same to and t submerging the same in a hot liquid wax for a period of from'twenty (20) to forty (40) minutes.

In testimony whereof I have afixed my signature in presence oftwo witnesses.

ROBERT G. CLYNE.

Witnesses:

R. M. FREDEJKING, A. M. BERNASH. 

